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alyssababy7

  • 3 years ago

x varies inversely as y^2, and x = 4 when y = 10. Find x when y = 2. A. x = 16 B. x = 5 C. x = 80 D. x = 100

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  1. ChmE
    • 3 years ago
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    \[x=\frac{ k }{ y^2 }\rightarrow 4=\frac{ k }{ 10^2 }\rightarrow k=400\]\[x=\frac{ 400 }{ y^2 }\rightarrow x=\frac{ 400 }{ 2^2 }\rightarrow x=100\]

  2. ChmE
    • 3 years ago
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    k is a proportionality constant

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